Commit Graph

37 Commits

Author SHA1 Message Date
naromero77 5f8810d7b4 [flang][docs] Initial documentation for the Fortran LLVM Test Suite.
Describes how to run the Fortran LLVM Test Suite, specifically the external SPEC CPU 2017 Fortran tests.

Reviewed By: rovka

Differential Revision: https://reviews.llvm.org/D102877
2021-05-26 15:59:55 -05:00
Andrzej Warzynski 941269133e [flang][docs] Update driver sync-up call link
The old invitation has expired, so I've created a new one and update the
link in the docs accordingly.
2021-05-20 14:37:28 +00:00
peter klausler 72abc19977 [flang] Support legacy extension OPEN(ACCESS='APPEND')
It should of course be POSITION='APPEND' but Sun Fortran
supported it on ACCESS=.

Differential Revision: https://reviews.llvm.org/D102350
2021-05-13 11:51:20 -07:00
peter klausler 47283e1556 [flang] (NFC) Document Fortran feature history
Add flang/docs/FortranFeatureHistory.md

Differential Revision: https://reviews.llvm.org/D101081
2021-04-22 11:24:22 -07:00
Andrzej Warzynski da408d98d7 [flang][docs] Fix the time for the new Flang driver call 2021-03-15 17:25:55 +00:00
peter klausler ea2ff54ccc [flang] Extension: forward refs to dummy args under IMPLICIT NONE
Most Fortran compilers accept the following benign extension,
and it appears in some applications:

  SUBROUTINE FOO(A,N)
    IMPLICIT NONE
    REAL A(N) ! N is used before being typed
    INTEGER N
  END

Allow it in f18 only for default integer scalar dummy arguments.

Differential Revesion: https://reviews.llvm.org/D96982
2021-02-18 13:14:34 -08:00
peter klausler b82a8c3f23 [flang] Warn about useless explicit typing of intrinsics
Fortran 2018 explicitly permits an ignored type declaration
for the result of a generic intrinsic function.  See the comment
added to Semantics/expression.cpp for an explanation of why this
is somewhat dangerous and worthy of a warning.

Differential Revision: https://reviews.llvm.org/D96879
2021-02-17 13:13:59 -08:00
peter klausler 34eb0adaa9 [flang] Add -fsyntax-only to f18; retain -fparse-only synonym
Now that semantics is working, the standard -fsyntax-only option of
GNU and Clang should be used as the name of the option that causes
f18 to just run the front-end.  Support both options in f18, silently
accepting the old option as a synonym for the new one (as
preferred by the code owner), and replace all instances of the
old -fparse-only option with -fsyntax-only throughout the source base.

Differential Revision: https://reviews.llvm.org/D95887
2021-02-03 09:01:39 -08:00
xgupta 94fac81fcc [Branch-Rename] Fix some links
According to the [[ https://foundation.llvm.org/docs/branch-rename/ | status of branch rename ]], the master branch of the LLVM repository is removed on 28 Jan 2021.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D95766
2021-02-01 16:43:21 +05:30
peter klausler ebe74d9592 [flang] Support disabled alternative PARAMETER statement
Legacy Fortran implementations support an alternative form of the
PARAMETER statement; it differs syntactically from the standard's
PARAMETER statement by lacking parentheses, and semantically by
using the type and shape of the initialization expression to define
the attributes of the named constant.  (GNU Fortran gets that part
wrong; Intel Fortran and nvfortran have full support.)

This patch disables the old style PARAMETER statement by default, as
it is syntactically ambiguous with conforming assignment statements;
adds a new "-falternative-parameter-statement" option to enable it;
and implements it correctly when enabled.

Fixes https://bugs.llvm.org/show_bug.cgi?id=48774, in which a user
tripped over the syntactic ambiguity.

Differential Revision: https://reviews.llvm.org/D95697
2021-01-29 15:30:06 -08:00
Andrzej Warzynski 9b64e0e205 [flang][docs] Add New Flang Driver Biweekly call 2021-01-29 16:57:20 +00:00
AlexisPerry 3b3a9d2418 Updated GettingInvolved.md to reflect Flang Biweekly Call changes
- updated the link to join the meeting to reflect the new WebEx information
   - Added a note about the new Google Doc for keeping track of notes, and who
     to contact if you experience access issues with the document
   - Left a reference to the minutes from previous meetings being available
     through a search of the flang-dev mailing list

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D93770
2020-12-23 11:59:12 -07:00
peter klausler 6aa3591e98 [flang] Implement STORAGE_SIZE(), SIZEOF(), C_SIZEOF()
STORAGE_SIZE() is a standard inquiry intrinsic (size in bits
of an array element of the same type as the argument); SIZEOF()
is a common extension that returns the size in bytes of its
argument; C_SIZEOF() is a renaming of SIZEOF() in module ISO_C_BINDING.

STORAGE_SIZE() and SIZEOF() are implemented via rewrites to
expressions; these expressions will be constant when the necessary
type parameters and bounds are also constant.

Code to calculate the sizes of types (with and without alignment)
was isolated into Evaluate/type.* and /characteristics.*.
Code in Semantics/compute-offsets.* to calculate sizes and alignments
of derived types' scopes was exposed so that it can be called at type
instantiation time (earlier than before) so that these inquiry intrinsics
could be called from specification expressions.

Differential Revision: https://reviews.llvm.org/D93322
2020-12-15 17:26:20 -08:00
peter klausler 4fede8bc8a [flang] Implement derived type description table encoding
Define Fortran derived types that describe the characteristics
of derived types, and instantiations of parameterized derived
types, that are of relevance to the runtime language support
library.  Define a suite of corresponding C++ structure types
for the runtime library to use to interpret instances of the
descriptions.

Create instances of these description types in Semantics as
static initializers for compiler-created objects in the scopes
that define or instantiate user derived types.

Delete obsolete code from earlier attempts to package runtime
type information.

Differential Revision: https://reviews.llvm.org/D92802
2020-12-08 10:26:58 -08:00
peter klausler 641ede93ef [flang] Improve initializer semantics, esp. for component default values
This patch plugs many holes in static initializer semantics, improves error
messages for default initial values and other component properties in
parameterized derived type instantiations, and cleans up several small
issues noticed during development.  We now do proper scalar expansion,
folding, and type, rank, and shape conformance checking for component
default initializers in derived types and PDT instantiations.
The initial values of named constants are now guaranteed to have been folded
when installed in the symbol table, and are no longer folded or
scalar-expanded at each use in expression folding.  Semantics documentation
was extended with information about the various kinds of initializations
in Fortran and when each of them are processed in the compiler.

Some necessary concomitant changes have bulked this patch out a bit:
* contextual messages attachments, which are now produced for parameterized
  derived type instantiations so that the user can figure out which
  instance caused a problem with a component, have been added as part
  of ContextualMessages, and their implementation was debugged
* several APIs in evaluate::characteristics was changed so that a FoldingContext
  is passed as an argument rather than just its intrinsic procedure table;
  this affected client call sites in many files
* new tools in Evaluate/check-expression.cpp to determine when an Expr
  actually is a single constant value and to validate a non-pointer
  variable initializer or object component default value
* shape conformance checking has additional arguments that control
  whether scalar expansion is allowed
* several now-unused functions and data members noticed and removed
* several crashes and bogus errors exposed by testing this new code
  were fixed
* a -fdebug-stack-trace option to enable LLVM's stack tracing on
  a crash, which might be useful in the future

TL;DR: Initialization processing does more and takes place at the right
times for all of the various kinds of things that can be initialized.

Differential Review: https://reviews.llvm.org/D92783
2020-12-07 14:40:41 -08:00
Johannes Doerfert c557f549ba [Flang][Docs] Update call information and add two more calls
Call information have been updated and the OpenMP in LLVM as well as
Classic Flang call have been added.
2020-11-25 11:52:35 -06:00
Pete Steinfeld da02327b9c
Update OptionComparison.md 2020-11-20 10:33:21 -08:00
peter klausler 5349f99114 [flang] Correct handling of null pointer initializers
Fortran defines "null-init" null pointer initializers as
being function references, syntactically, that have to resolve
to calls to the intrinsic function NULL() with no actual
arguments.

Differential revision: https://reviews.llvm.org/D91657
2020-11-18 13:57:25 -08:00
peter klausler c2bccd66f6 [flang] Document DO CONCURRENT's problems (NFC)
Differential Revision: https://reviews.llvm.org/D86556
2020-11-12 15:30:43 -08:00
peter klausler 29fa451870 [flang] Add isnan() extension intrinsic function, with folding
It's nonstandard, but commonly implemented.

Differential revision: https://reviews.llvm.org/D91213
2020-11-11 11:40:57 -08:00
sameeran joshi 7282d9e170 [Flang][Docs] Fix warnings when building docs.
Following warning were seen with recommonmark(0.5.0) and sphinx(1.8.5).
`parser.py:75: UserWarning: Container node skipped: type=document warn("Container node skipped: type={0}".format(mdnode.t))`

The warnings are due to an issue in recommonmark's(a python package) older versions.
A better solution is to use the latest version of recommonmark(>=0.6.0) to avoid
these issue in the first place.
This patch fixes the warnings for older versions.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D91117
2020-11-10 22:24:49 +05:30
peter klausler 8fc07fed32 [flang] Design document for runtime derived type descriptions (NFC)
Differential revision: https://reviews.llvm.org/D90500
2020-11-02 09:23:22 -08:00
Jean Perier 878b526409 [flang] Tighten rules to resolve procedure as intrinsic procedure
2 Bug fixes:

- Do not resolve procedure as intrinsic if they appeared in an
  EXTERNAL attribute statement (one path was not considering this flag)

- Emit an error if a procedure resolved to be an intrinsic function
  (resp. subroutine) is used as a subroutine (resp. function).
  Lowering was attempted while the evaluate::Expression for the
  call was missing without any errors.

1 behavior change:

- Do not implicitly resolve subroutines (resp. functions) as intrinsics
  because their name is the name of an intrinsic function (resp.
  subroutine). Add justification in documentation.

Reviewed By: klausler, tskeith

Differential Revision: https://reviews.llvm.org/D90049
2020-10-26 11:25:40 +01:00
SuJunda 000eb1f314 [docs][flang] Fix typos
Reviewed By: SouraVX

Differential Revision: https://reviews.llvm.org/D87885
2020-09-21 11:05:58 +05:30
Richard Barton af56be339f [flang] Fix docs build
Apply a local fix to an issue with recommonmark's AutoStructify extension
when used with certain versions of sphinx.

See https://github.com/readthedocs/recommonmark/issues/93

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D87714
2020-09-16 08:19:07 +01:00
sameeran joshi fe395aecd9 [Flang] Add GettingInvolved documentation page and sidebar.
Adds a new GettingInvolved page to documentation which provides details about
mailing list, chats and calls.

Adds a sidebar page which provides common links on
all documentation pages.
The links include:
-  Getting Started
-  Getting Involved
-  Github Repository
-  Bug Reports
-  Code Review

Depends on https://reviews.llvm.org/D87242

Reviewed By: richard.barton.arm

Differential Revision: https://reviews.llvm.org/D87270
2020-09-15 18:43:59 +05:30
Richard Barton 271a7bb144 [flang] Add new documentation main page
Add a new index page to be the Flang documentation mainpage instead of
Overview.md, which jumps straight into the compiler Design. The index file
needs to be in .rst format to use the toctree directive to create table of
contents.

Also use the sphinx_markdown_tables extension to generate html tables form
markdown.

A number of additional style changes to the existing docs were needed to make
this work well:
 * Convert all headings to the # style, which works better with toctree's
   titlesonly option. Ensure that there is only one top-level heading per
   document.
 * Add a title to documents that don't have one for rendering on the index.
 * Convert the grammar docs from .txt to .md. for better rendering
 * Fixed broken link to a section in another document - sphinx does not seem to
   support anchor links in markdown files.

Depends on D87226

Reviewed By: sameeranjoshi

Differential Revision: https://reviews.llvm.org/D87242
2020-09-11 14:19:51 +01:00
Sourabh Singh Tomar 932aae77e9 Revert D86875 "[Flang][NFC] Remove license comments from files in docs/ folder."
This reverts commit f787c9a90c, this was causing some build issues.
2020-09-10 23:04:37 +05:30
Richard Barton 69230e75f1 [flang] Convert release notes to markdown
Switch ReleaseNotes from .rst to .md to match the other docs.

At the same time, fix the version number for master.
2020-09-08 08:47:33 +01:00
Kiran Kumar T P 4536c6acb3 [flang][OpenMP] Enhance parser support for atomic construct to OpenMP 5.0
Summary:
This patch enhances parser support for atomic construct to OpenMP 5.0.
2.17.7 atomic -> ATOMIC [clause [,]] atomic-clause [[,] clause] |
                 ATOMIC [clause]
       clause -> memory-order-clause | HINT(hint-expression)
       memory-order-clause -> SEQ_CST | ACQ_REL | RELEASE | ACQUIRE | RELAXED
       atomic-clause -> READ | WRITE | UPDATE | CAPTURE

The patch includes code changes and testcase modifications.

Reviewed By: DavidTruby, kiranchandramohan, sameeranjoshi

Differential Revision: https://reviews.llvm.org/D82931
2020-09-08 06:52:07 +05:30
Richard Barton 2e1827271c [flang] Fix link to old repo location in doxygen mainpage. NFC. 2020-09-07 16:43:08 +01:00
peter klausler c963757783 [flang] Implement nonstandard OPEN statement CARRIAGECONTROL specifier
Differential Revision: https://reviews.llvm.org/D87052
2020-09-02 13:07:45 -07:00
sameeran joshi f787c9a90c [Flang][NFC] Remove license comments from files in docs/ folder.
Solves issue https://reviews.llvm.org/D86131#2247275

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D86875
2020-08-31 18:52:59 +05:30
Sameeran joshi bc9cdfa12b [FLANG] Pick `.md` files when building sphinx documentation.
Need to build sphinx using below flags to Cmake
`-DLLVM_ENABLE_SPHINX=ON -DSPHINX_WARNINGS_AS_ERRORS=OFF`.
Generate html docs using cmake target
`docs-flang-html`
Generated html files should be at `build/tools/flang/docs/html`.
Patch in series from the dicussion on review
https://reviews.llvm.org/D85828

After this patch the markdown docmentation must be written using guide in-
`llvm/docs/MarkdownQuickstartTemplate.md`

Reviewed By: sscalpone

Differential Revision: https://reviews.llvm.org/D86131
2020-08-24 22:11:15 +05:30
sameeran joshi eaff200429 [Flang] Move markdown files(.MD) from documentation/ to docs/
Summary:
Other LLVM sub-projects use docs/ folder for documentation files.
Follow LLVM project policy.
Modify `documentation/` references in sources to `docs/`.
This patch doesn't modify files to reStructuredText(.rst) file format.

Reviewed By: DavidTruby, sscalpone

Differential Revision: https://reviews.llvm.org/D85884
2020-08-18 15:14:15 +05:30
sameeran joshi 2fc86ccdd2 [Flang] Fix release blocker issue #46931 related to documentation.
Summary:
Fixes bug : https://bugs.llvm.org/show_bug.cgi?id=46931
This commit add a new flag -DLLVM_ENABLE_SPHINX=ON to cmake command to generate sphinx documentation,
along with new cmake targets `docs-flang-html`.
`ninja docs-flang-html` - generates sphinx documentation.
Generated release notes are present in <builddir>/tools/flang/docs/html/ folder.

Reviewers: richard.barton.arm, DavidTruby

Tags: #flang

Differential Revision: https://reviews.llvm.org/D85470
2020-08-11 23:22:30 +05:30
sameeran joshi 807fe05d35 [flang][docs] Doxygen support in flang.
Summary:
    Added support for doxygen-style documentation generation from source code.
    Added -DLLVM_ENABLE_DOXYGEN=ON -DFLANG_INCLUDE_DOCS=ON flags to cmake.
    Added the target doxygen-flang for building doxygen
    Updated README.txt

    Reviewers: DavidTruby, richard.barton.arm, sscalpone,  mehdi_amini, jdoerfert

    Reviewed By: DavidTruby, richard.barton.arm, sscalpone

    Previous review: https://github.com/flang-compiler/f18/pull/1065

    Differential Revision: https://reviews.llvm.org/D78136
2020-04-27 15:02:29 +05:30